消毒体系对对氯间二甲苯酚转化机制研究  

Study on the transformation mechanism of PCMX by disinfection system

作　　者：从相臣 吴思思 赛东舜 成小翔 杨涛[2,3] 马军[4] CONG Xiangchen;WU Sisi;SAI Dongshun;CHENG Xiaoxiang;YANG Tao;MA Jun(School of Municipal and Environmental Engineering,Shandong Jianzhu University,Jinan Shandong 250101;Innovation Center of Yangtze River Delta,Zhejiang University,Jiaxing Zhejiang 314102;School of Environmental and Chemical Engineering,Wuyi University,Jiangmen Guangdong 529020;School of Environment,Harbin Institute of Technology,Harbin Heilongjiang 150090)

机构地区：[1]山东建筑大学市政与环境工程学院,山东济南250101 [2]浙江大学长三角智慧绿洲创新中心,浙江嘉兴314102 [3]五邑大学环境与化学工程学院,广东江门529020 [4]哈尔滨工业大学环境学院,黑龙江哈尔滨150090

出　　处：《环境污染与防治》2025年第2期65-71,87,共8页Environmental Pollution & Control

基　　金：国家自然科学基金青年科学基金项目(No.52100013);国家重点实验室开放课题(No.ES202222);广东省自然科学基金面上项目(No.2023A1515011864);广东省教育厅重点领域项目(No.2024ZDZX4016)。

摘　　要：对氯间二甲苯酚(PCMX)是一种典型的抗菌化合物,常存在于水体中,具有持久性和潜在危害性,需探究经济、高效去除PCMX的方法。研究了NaClO对PCMX的降解效率及动力学规律,结果表明:NaClO能有效降解PCMX,且反应过程符合二级动力学;pH对降解速率影响较大,通过酸碱质子化模型拟合发现,pH在8~9时主要发生的是HClO与脱质子化PCMX(PCMX-)的反应,降解速率在此pH范围达到最大;随着Br^(-)和I-浓度增大,PCMX降解速率逐渐增大,主要是由于Br^(-)和I-与NaClO反应生成HOBr和HOI,而HOBr和HOI可与PCMX发生亲电取代反应,进而促进PCMX的降解;然而腐殖酸会与PCMX竞争有效氯,降低有效氯浓度,从而抑制PCMX的降解。由此可知,NaClO能有效地降解PCMX,研究结果为污水处理厂运用NaClO处理PCMX提供理论依据。Chloroxylenol(PCMX)is a typical antibacterial compound,which widely exists in aquatic environments and has long-lasting and potentially harmful properties.Thus,it is necessary to explore an economical and efficient method to degrade PCMX.This study investigated the efficiency and kinetics of PCMX degradation by NaClO.The results showed that NaClO could effectively degrade PCMX,and the reaction process followed the second-order reaction kinetics.The pH had a great influence on the degradation of PCMX.The fitting results of acid-base protonation model showed that the reaction between HClO and PCMX-was the main reaction at pH 8-9 and the degradation rate reached the maximum during pH 8-9.Moreover,the degradation rate of PCMX increased with the increase of Br^(-)and I-concentration.Br^(-)and I-could react with NaClO to form HOBr and HOI,which could react with PCMX through electrophilic substitution reaction,thereby promoting the degradation of PCMX.However,humic acid would compete with PCMX for chlorine and then reduced the concentration of chlorine,thereby inhibiting the degradation of PCMX.Therefore,NaClO could effectively degrade PCMX,and this study could provide a theoretical basis for the treatment of wastewater containing PCMX by NaClO.

关 键 词：对氯间二甲苯酚 NACLO 动力学 PH 

分 类 号：X703[环境科学与工程—环境工程]